./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/merge_sort-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54165abed718b8d39f88748583b76365fb540324 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 08:52:34,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 08:52:34,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 08:52:34,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 08:52:34,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 08:52:34,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 08:52:34,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 08:52:34,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 08:52:34,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 08:52:34,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 08:52:34,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 08:52:34,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 08:52:34,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 08:52:34,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 08:52:34,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 08:52:34,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 08:52:34,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 08:52:34,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 08:52:34,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 08:52:34,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 08:52:34,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 08:52:34,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 08:52:34,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 08:52:34,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 08:52:34,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 08:52:34,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 08:52:34,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 08:52:34,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 08:52:34,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 08:52:34,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 08:52:34,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 08:52:34,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 08:52:34,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 08:52:34,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 08:52:34,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 08:52:34,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 08:52:34,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 08:52:34,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 08:52:34,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 08:52:34,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 08:52:34,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 08:52:34,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 08:52:34,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 08:52:34,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 08:52:34,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 08:52:34,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 08:52:34,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 08:52:34,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 08:52:34,398 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 08:52:34,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 08:52:34,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 08:52:34,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 08:52:34,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 08:52:34,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 08:52:34,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 08:52:34,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 08:52:34,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 08:52:34,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 08:52:34,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 08:52:34,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 08:52:34,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 08:52:34,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 08:52:34,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 08:52:34,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 08:52:34,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 08:52:34,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 08:52:34,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 08:52:34,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 08:52:34,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 08:52:34,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 08:52:34,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 08:52:34,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 08:52:34,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54165abed718b8d39f88748583b76365fb540324 [2021-08-29 08:52:34,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 08:52:34,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 08:52:34,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 08:52:34,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 08:52:34,708 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 08:52:34,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2021-08-29 08:52:34,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e2deaad/afae69174a7340fbbce2269138f003cb/FLAGec4363af7 [2021-08-29 08:52:35,150 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 08:52:35,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2021-08-29 08:52:35,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e2deaad/afae69174a7340fbbce2269138f003cb/FLAGec4363af7 [2021-08-29 08:52:35,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e2deaad/afae69174a7340fbbce2269138f003cb [2021-08-29 08:52:35,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 08:52:35,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 08:52:35,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 08:52:35,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 08:52:35,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 08:52:35,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e97857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35, skipping insertion in model container [2021-08-29 08:52:35,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 08:52:35,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 08:52:35,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2021-08-29 08:52:35,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 08:52:35,769 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 08:52:35,804 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-1.i[22632,22645] [2021-08-29 08:52:35,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 08:52:35,846 INFO L208 MainTranslator]: Completed translation [2021-08-29 08:52:35,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35 WrapperNode [2021-08-29 08:52:35,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 08:52:35,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 08:52:35,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 08:52:35,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 08:52:35,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 08:52:35,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 08:52:35,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 08:52:35,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 08:52:35,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 08:52:35,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 08:52:35,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 08:52:35,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 08:52:35,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (1/1) ... [2021-08-29 08:52:35,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 08:52:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 08:52:35,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 08:52:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 08:52:35,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 08:52:35,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 08:52:35,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 08:52:35,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 08:52:36,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 08:52:36,342 INFO L299 CfgBuilder]: Removed 75 assume(true) statements. [2021-08-29 08:52:36,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:52:36 BoogieIcfgContainer [2021-08-29 08:52:36,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 08:52:36,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 08:52:36,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 08:52:36,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 08:52:36,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:52:35" (1/3) ... [2021-08-29 08:52:36,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc3a5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:52:36, skipping insertion in model container [2021-08-29 08:52:36,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:52:35" (2/3) ... [2021-08-29 08:52:36,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc3a5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:52:36, skipping insertion in model container [2021-08-29 08:52:36,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:52:36" (3/3) ... [2021-08-29 08:52:36,349 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2021-08-29 08:52:36,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 08:52:36,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-08-29 08:52:36,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 08:52:36,419 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 08:52:36,419 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-08-29 08:52:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 98 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 08:52:36,448 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:36,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 08:52:36,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:36,458 INFO L82 PathProgramCache]: Analyzing trace with hash 890218827, now seen corresponding path program 1 times [2021-08-29 08:52:36,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:36,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325760021] [2021-08-29 08:52:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:36,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:52:36,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:36,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325760021] [2021-08-29 08:52:36,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325760021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:36,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 08:52:36,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931933194] [2021-08-29 08:52:36,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 08:52:36,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 08:52:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 08:52:36,618 INFO L87 Difference]: Start difference. First operand has 99 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 98 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:36,800 INFO L93 Difference]: Finished difference Result 196 states and 316 transitions. [2021-08-29 08:52:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 08:52:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 08:52:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:36,809 INFO L225 Difference]: With dead ends: 196 [2021-08-29 08:52:36,809 INFO L226 Difference]: Without dead ends: 92 [2021-08-29 08:52:36,812 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 08:52:36,815 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.93ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:36,816 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 148.93ms Time] [2021-08-29 08:52:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-29 08:52:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-08-29 08:52:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2021-08-29 08:52:36,850 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 6 [2021-08-29 08:52:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:36,851 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2021-08-29 08:52:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2021-08-29 08:52:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 08:52:36,852 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:36,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:36,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 08:52:36,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1806865150, now seen corresponding path program 1 times [2021-08-29 08:52:36,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:36,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692238072] [2021-08-29 08:52:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:36,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:52:36,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:36,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692238072] [2021-08-29 08:52:36,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692238072] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:36,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:36,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 08:52:36,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266876982] [2021-08-29 08:52:36,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 08:52:36,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:36,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 08:52:36,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 08:52:36,928 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:37,062 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2021-08-29 08:52:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 08:52:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-29 08:52:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:37,063 INFO L225 Difference]: With dead ends: 182 [2021-08-29 08:52:37,063 INFO L226 Difference]: Without dead ends: 98 [2021-08-29 08:52:37,064 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.39ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 08:52:37,065 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.50ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:37,065 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 122.50ms Time] [2021-08-29 08:52:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-29 08:52:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-08-29 08:52:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-08-29 08:52:37,071 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 7 [2021-08-29 08:52:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:37,071 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-08-29 08:52:37,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-08-29 08:52:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 08:52:37,072 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:37,072 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:37,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 08:52:37,073 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 663763925, now seen corresponding path program 1 times [2021-08-29 08:52:37,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:37,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747471425] [2021-08-29 08:52:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:37,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:52:37,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:37,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747471425] [2021-08-29 08:52:37,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747471425] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:37,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:37,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 08:52:37,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733678337] [2021-08-29 08:52:37,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 08:52:37,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 08:52:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 08:52:37,126 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:37,364 INFO L93 Difference]: Finished difference Result 251 states and 286 transitions. [2021-08-29 08:52:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 08:52:37,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 08:52:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:37,366 INFO L225 Difference]: With dead ends: 251 [2021-08-29 08:52:37,366 INFO L226 Difference]: Without dead ends: 245 [2021-08-29 08:52:37,366 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.57ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-29 08:52:37,367 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 577 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.01ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:37,367 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 0 Invalid, 263 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [6 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 209.01ms Time] [2021-08-29 08:52:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-29 08:52:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 96. [2021-08-29 08:52:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 95 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2021-08-29 08:52:37,374 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 13 [2021-08-29 08:52:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:37,374 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2021-08-29 08:52:37,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2021-08-29 08:52:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 08:52:37,375 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:37,375 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:37,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 08:52:37,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2036062252, now seen corresponding path program 1 times [2021-08-29 08:52:37,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:37,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567894804] [2021-08-29 08:52:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:37,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 08:52:37,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:37,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567894804] [2021-08-29 08:52:37,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567894804] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:37,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:37,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 08:52:37,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423965348] [2021-08-29 08:52:37,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 08:52:37,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:37,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 08:52:37,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 08:52:37,427 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:37,652 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2021-08-29 08:52:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 08:52:37,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 08:52:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:37,654 INFO L225 Difference]: With dead ends: 125 [2021-08-29 08:52:37,654 INFO L226 Difference]: Without dead ends: 123 [2021-08-29 08:52:37,654 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.25ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 08:52:37,655 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.91ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:37,655 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [1 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 208.91ms Time] [2021-08-29 08:52:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-29 08:52:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-08-29 08:52:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 93 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2021-08-29 08:52:37,661 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 20 [2021-08-29 08:52:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:37,661 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2021-08-29 08:52:37,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2021-08-29 08:52:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 08:52:37,662 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:37,663 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:37,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 08:52:37,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2014113239, now seen corresponding path program 1 times [2021-08-29 08:52:37,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:37,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580365255] [2021-08-29 08:52:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:37,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 08:52:37,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:37,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580365255] [2021-08-29 08:52:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580365255] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:37,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:37,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 08:52:37,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831276424] [2021-08-29 08:52:37,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 08:52:37,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 08:52:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 08:52:37,712 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:37,916 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-08-29 08:52:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 08:52:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 08:52:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:37,917 INFO L225 Difference]: With dead ends: 94 [2021-08-29 08:52:37,918 INFO L226 Difference]: Without dead ends: 92 [2021-08-29 08:52:37,918 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.61ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 08:52:37,919 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.17ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:37,919 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 365 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 190.17ms Time] [2021-08-29 08:52:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-29 08:52:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-08-29 08:52:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-08-29 08:52:37,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 20 [2021-08-29 08:52:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:37,923 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-08-29 08:52:37,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-08-29 08:52:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 08:52:37,924 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:37,924 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:37,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 08:52:37,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1486605840, now seen corresponding path program 1 times [2021-08-29 08:52:37,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:37,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865714653] [2021-08-29 08:52:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:37,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:52:37,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:37,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865714653] [2021-08-29 08:52:37,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865714653] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:37,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:37,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 08:52:37,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718444534] [2021-08-29 08:52:37,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 08:52:37,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 08:52:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 08:52:37,974 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:38,244 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2021-08-29 08:52:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 08:52:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 08:52:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:38,245 INFO L225 Difference]: With dead ends: 210 [2021-08-29 08:52:38,245 INFO L226 Difference]: Without dead ends: 208 [2021-08-29 08:52:38,246 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.38ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-29 08:52:38,246 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 392 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 235.00ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:38,246 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 0 Invalid, 394 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [9 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 235.00ms Time] [2021-08-29 08:52:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-29 08:52:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 98. [2021-08-29 08:52:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 97 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2021-08-29 08:52:38,251 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 23 [2021-08-29 08:52:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:38,251 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2021-08-29 08:52:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2021-08-29 08:52:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 08:52:38,252 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:38,252 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:38,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-29 08:52:38,252 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:38,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1760261746, now seen corresponding path program 1 times [2021-08-29 08:52:38,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:38,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752657843] [2021-08-29 08:52:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:38,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:52:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:52:38,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:52:38,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752657843] [2021-08-29 08:52:38,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752657843] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:52:38,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:52:38,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 08:52:38,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487103298] [2021-08-29 08:52:38,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 08:52:38,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:52:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 08:52:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-29 08:52:38,305 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:52:38,577 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2021-08-29 08:52:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 08:52:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 08:52:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:52:38,578 INFO L225 Difference]: With dead ends: 208 [2021-08-29 08:52:38,578 INFO L226 Difference]: Without dead ends: 206 [2021-08-29 08:52:38,578 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.87ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-29 08:52:38,579 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 386 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 238.21ms IncrementalHoareTripleChecker+Time [2021-08-29 08:52:38,579 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 0 Invalid, 394 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [9 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 238.21ms Time] [2021-08-29 08:52:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-29 08:52:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 104. [2021-08-29 08:52:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2021-08-29 08:52:38,583 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 23 [2021-08-29 08:52:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:52:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2021-08-29 08:52:38,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:52:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2021-08-29 08:52:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 08:52:38,584 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:52:38,584 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:52:38,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 08:52:38,584 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-08-29 08:52:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:52:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2060804288, now seen corresponding path program 1 times [2021-08-29 08:52:38,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:52:38,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573329351] [2021-08-29 08:52:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:52:38,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:52:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 08:52:38,614 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 08:52:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 08:52:38,638 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 08:52:38,638 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 08:52:38,639 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (12 of 13 remaining) [2021-08-29 08:52:38,640 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2021-08-29 08:52:38,641 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2021-08-29 08:52:38,641 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2021-08-29 08:52:38,641 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2021-08-29 08:52:38,641 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2021-08-29 08:52:38,641 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2021-08-29 08:52:38,641 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2021-08-29 08:52:38,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2021-08-29 08:52:38,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2021-08-29 08:52:38,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2021-08-29 08:52:38,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2021-08-29 08:52:38,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2021-08-29 08:52:38,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-29 08:52:38,662 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 08:52:38,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 08:52:38 BoogieIcfgContainer [2021-08-29 08:52:38,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 08:52:38,693 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 08:52:38,693 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 08:52:38,693 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 08:52:38,694 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:52:36" (3/4) ... [2021-08-29 08:52:38,695 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 08:52:38,718 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 08:52:38,718 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 08:52:38,718 INFO L158 Benchmark]: Toolchain (without parser) took 3214.96ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 44.0MB in the beginning and 28.8MB in the end (delta: 15.2MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,718 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 46.1MB. Free memory was 28.1MB in the beginning and 28.1MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 08:52:38,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.29ms. Allocated memory is still 60.8MB. Free memory was 43.8MB in the beginning and 36.6MB in the end (delta: 7.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,719 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.82ms. Allocated memory is still 60.8MB. Free memory was 36.6MB in the beginning and 33.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,719 INFO L158 Benchmark]: Boogie Preprocessor took 29.08ms. Allocated memory is still 60.8MB. Free memory was 33.9MB in the beginning and 31.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,719 INFO L158 Benchmark]: RCFGBuilder took 417.30ms. Allocated memory is still 60.8MB. Free memory was 31.1MB in the beginning and 26.5MB in the end (delta: 4.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,720 INFO L158 Benchmark]: TraceAbstraction took 2347.79ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 26.0MB in the beginning and 31.6MB in the end (delta: -5.7MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,720 INFO L158 Benchmark]: Witness Printer took 24.90ms. Allocated memory is still 88.1MB. Free memory was 30.9MB in the beginning and 28.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 08:52:38,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 46.1MB. Free memory was 28.1MB in the beginning and 28.1MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.29ms. Allocated memory is still 60.8MB. Free memory was 43.8MB in the beginning and 36.6MB in the end (delta: 7.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.82ms. Allocated memory is still 60.8MB. Free memory was 36.6MB in the beginning and 33.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.08ms. Allocated memory is still 60.8MB. Free memory was 33.9MB in the beginning and 31.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 417.30ms. Allocated memory is still 60.8MB. Free memory was 31.1MB in the beginning and 26.5MB in the end (delta: 4.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2347.79ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 26.0MB in the beginning and 31.6MB in the end (delta: -5.7MB). Peak memory consumption was 21.1MB. Max. memory is 16.1GB. * Witness Printer took 24.90ms. Allocated memory is still 88.1MB. Free memory was 30.9MB in the beginning and 28.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L638] struct list *data = ((void *)0); [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE !(!node) [L643] node->next = node [L644] node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE !(!item) [L648] item->slist = node [L649] item->next = data [L650] data = item [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L615] COND FALSE !(!(shape)) [L616] shape->next [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) [L623] EXPR shape->next [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L565] reach_error() - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 99 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 2235.18ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 21.96ms, AutomataDifference: 1589.51ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.50ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1417 SdHoareTripleChecker+Valid, 1352.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1417 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1096.70ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 975 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2077 IncrementalHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 0 mSDtfsCounter, 2077 mSolverCounterSat, 11.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 126.09ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=7, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 51.08ms AutomataMinimizationTime, 7 MinimizatonAttempts, 394 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.69ms SsaConstructionTime, 93.74ms SatisfiabilityAnalysisTime, 272.62ms InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 512 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 08:52:38,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...